Results 51 to 60 of about 20,157 (236)

Sustainable Process for the Depolymerization/Oxidation of Softwood and Hardwood Kraft Lignins Using Hydrogen Peroxide under Ambient Conditions

Molecules, 2020
The present study demonstrated a sustainable and cost-effective approach to depolymerize/oxidize softwood (SW) and hardwood (HW) kraft lignins using concentrated hydrogen peroxide at temperatures ranging from 25 to 35 °C, in the absence of catalysts or ...
Zaid Ahmad, Waleed Wafa Al Dajani, Michael Paleologou, Chunbao (Charles) Xu   +3 more
doaj   +1 more source

Char Layer Thickness Evolution During Structural Timber Fire Experiment and Final Density Profile

Fire and Materials, EarlyView.
ABSTRACT This paper evaluates several non‐destructive experimental methods for determining the char layer thickness and its density profile in structural timber samples exposed to standard ISO 834 fire curve experiments. Microwave echo pulse, ultrasonic echo pulse, X‐ray computed tomography, and resistance drilling were evaluated.
Fernando Pérez Pérez, Kiarash Tajbakhsh, Joachim Schmid, Robert Zboray, Andrea Frangi   +4 more
wiley   +1 more source

Effect of Physical Properties of Softwoods on Embedment Strength Performance of Self-tapping Screws

BioResources, 2023
The embedment strength performance of the self-tapping screw (STS) connector, used as a cross-laminated timber fastener, was evaluated considering tree species’ density and load direction as parameters.
In-Hwan Lee, Keon-Ho Kim
doaj   +2 more sources

Evaluation of degradation in chemical compounds of wood in historical buildings using ft-ir and ft-raman vibrational spectroscopy

Maderas: Ciencia y Tecnología, 2019
Vibrational spectroscopy approaches like FT-IR and FT-Raman, as analytical method, can be used to assess chemical changes in historical wood structures.
Seyed Mahdi Moosavi Nejad, Mehrab Madhoushi, Mohammad Vakili, Davood Rasouli   +3 more
doaj  

Hardwoods and Softwoods

The Ballarat Naturalist, 2003
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
openaire   +1 more source

Low‐Hysteresis Cellulose‐Based Hydrogels for Strain Detecting

Macromolecular Rapid Communications, EarlyView.
Low‐hysteresis hydrogel with high cellulose content is prepared. The modified cellulose is prepared through a sequential periodate oxidation and borohydride reduction process. The hydrogel can be used as a strain sensor with a gauge factor of 1.1 in the 0%–300% sensing range.
Xia Sun, Fanghan Luo, Feng Jiang
wiley   +1 more source

Lytic polysaccharide monooxygenase (LPMO) mediated production of ultra-fine cellulose nanofibres from delignified softwood fibres

Green Chemistry, 2019
An environmentally friendly, energy-efficient method for cellulose nanofibre (CNF) production from softwood holocellulose utilising oxidative enzymes, lytic polysaccharide monooxygenases (LPMOs).
Salla Koskela, Shennan Wang, Ding-feng Xu, Xuan Yang, Kai Li, L. Berglund, L. McKee, V. Bulone, Qi Zhou   +8 more
semanticscholar   +1 more source

The Relationship between Different Proofs of Load-Bearing Capacity, Fire Resistance of the Cross-Section and the Price of Solid Softwood

Buildings
The impact of ultimate limit state checks on the fire resistance of the cross-section (element) of softwood structural timber is analyzed in this study, which was found to depend on the cross-sectional area, strength class or material quality expressed ...
Jurko Zovkić, Zlata Dolaček-Alduk
doaj   +1 more source

The importance of biodiversity components differs among wood‐based material Nature's contributions to people (NCP) in a tropical montane ecosystem

Oikos, EarlyView.
Biodiversity can influence forest productivity, but this does not necessarily translate into higher provision of wood‐based Nature's contributions to people (NCP), as only a subset of the wood produced is used for each NCP. Biodiversity–NCP relationships therefore require further assessment.
Koggani Dickson Koggani, Peter Manning, Andreas Ensslin, Gemma Rutten, Armin Komposch, Markus Fischer, Andreas Hemp, Andrea Larissa Boesing   +7 more
wiley   +1 more source

Caring for forests between attitude and platitude. Social relationships with nature in industrial forestry in Äänekoski, Finland

People and Nature, EarlyView.
Abstract Forests play a pivotal role in sustainability transitions. This article explores how people's relationships with forests, particularly how they care for or take care of them, shape and reflect broader tendencies and tensions in forest utilization and governance.
Jana Rebecca Holz
wiley   +1 more source